CN218077237U - Pipe network type oxidation air pipe retention crushing device - Google Patents
Pipe network type oxidation air pipe retention crushing device Download PDFInfo
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- CN218077237U CN218077237U CN202222143183.5U CN202222143183U CN218077237U CN 218077237 U CN218077237 U CN 218077237U CN 202222143183 U CN202222143183 U CN 202222143183U CN 218077237 U CN218077237 U CN 218077237U
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Abstract
The utility model provides a pipe network formula oxidation tuber pipe is detained breaker, including a plurality of delay broken module of installing on pipe network formula oxidation wind branch pipe upper portion, it includes the baffle to be detained broken module, the installing zone has set gradually on the baffle, the bubble is detained the district, bubble breakage district and bubble equipartition district, the venthole of oxidation wind branch pipe is located the baffle below, the installing zone is used for fixing on the oxidation wind branch pipe, set up a plurality of interval arrangement's broken hole on the baffle of bubble breakage district, install broken subassembly on broken hole, set up a plurality of interval arrangement's air vent on the baffle of bubble equipartition district, the air vent has the aperture size who is less than the venthole. The utility model discloses the span structure and the different regions that set up have not only improved the residence time of oxidation wind bubble, have still reduced the bubble size through the breakage, and when can effectively reduce the unit variable working condition, the amount of wind that supplies under the different oxidation wind demand has improved the utilization ratio of oxidation air to improve oxidation efficiency in the wet flue gas desulfurization technology.
Description
Technical Field
The utility model relates to a pipe network formula oxidation tuber pipe is detained breaker belongs to wet flue gas desulfurization equipment technical field.
Background
The oxidation of sulfite is an important reaction in the limestone-gypsum wet desulphurization process, and the sulfite is oxidized into sulfate by the dissolved oxygen in the slurry of the absorption tower and finally crystallized and separated out in the form of gypsum, which plays an important role in the quality of the desulphurization slurry, the desulphurization efficiency and the gypsum quality. The oxidation system of the limestone-gypsum wet desulphurization facility adopts a forced oxidation process, the dissolved oxygen in the desulphurization slurry mainly comes from the oxidation air sprayed into the oxidation zone of the absorption tower, and the safe and economic operation of the wet desulphurization is adversely affected by insufficient or excessive oxidation air or uneven distribution of the oxidation air.
At present, the arrangement of the desulfurization oxidation air pipe is mainly divided into a pipe network type mode and a spray gun type mode, the spray gun type mode has certain problems, the pipe network type oxidation air pipe is complex in structure compared with the spray gun type mode, the construction and installation process requirement is high, the phenomena of blockage and fracture are easy to occur, in order to avoid the blockage of an air jet hole, an oxidation fan must continuously operate, and the requirement on the reliability of the fan is high. Oxygen is indissolvable gas, bubbles entering slurry of the absorption tower through a pipe network type oxidation air pipe are large, especially under the working condition of low liquid level, a large amount of large bubbles cannot be dissolved into the desulfurization slurry in time and escape through the liquid level, so that the retention time of the bubbles in the slurry is short and is only 2.5-3.3 s, the utilization rate of the dissolved oxygen of an oxidation air system is low and is only 25% -33%, the energy consumption of the oxidation air fan is improved, especially in the long-term operation process, the phenomenon is aggravated due to the fact that the air bubbles are too large due to the blockage, breakage and other problems of the oxidation air pipe, the energy consumption of the oxidation air fan is further improved, the energy saving and consumption reduction of the oxidation air fan has a large lifting space, in the operation process of a desulfurization facility, how to avoid the blockage of the pipe network type oxidation air pipe and how to improve the utilization rate of the oxidation air are important measures for reducing the energy consumption of the oxidation air fan, and the technical problem that needs to be solved at present in urgent need is also existed in the pipe network type oxidation air system.
In order to solve the problem, in the wet desulphurization oxidation air pipe device with application number 202020255671.3, the oxidation air pipe comprises a vertical pipe, a main pipe and a plurality of branch pipes communicated with the main pipe, the main pipe is provided with an air inlet, one end of the vertical pipe is communicated with the air inlet of the main pipe, the other end of the vertical pipe penetrates through the desulphurization tower and is communicated with an air outlet of an oxidation fan arranged outside the desulphurization tower, a plurality of nozzles are arranged on each branch pipe at intervals, and the openings of the nozzles are arranged downwards. As can be seen from the structure, this patent uses an air duct arrangement in conjunction with a spray head. The arrangement of the oxidation air pipes can effectively reduce the dead zone of the oxidation absorption tower, so that the distribution of oxidation air is uniform, and the oxidation efficiency is greatly improved; the nozzle can split the oxidation air into fine bubbles, which is beneficial to dissolution, increases the mass transfer coefficient and improves the absorption and oxidation efficiency of the calcium sulfite slurry, so that the desulfurization and oxidation rate is greatly improved, the gypsum quality is improved and unnecessary limestone consumption is reduced; the air quantity of the oxidation fan and the pressure of the oxidation fan are reduced, and the corresponding investment cost can be reduced, however, for the pipe network type oxidation air pipe structure, the solution can not be directly used in the pipe network type oxidation air pipe structure, and the technical problem that the equipment can be specifically solved by a structure which can be directly applied to the pipe network type oxidation air pipe is needed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of above-mentioned prior art, the utility model provides a pipe network formula oxidation tuber pipe is detained breaker for improve oxidation efficiency in the wet flue gas desulfurization technology, solve the problem that there are tuber pipe jam, oxidation air utilization low in the operation of pipe network formula oxidation tuber pipe.
In order to realize the technical purpose, the utility model provides a pipe network formula oxidation tuber pipe is detained breaker, including a plurality of installations on pipe network formula oxidation wind branch pipe, and be located the delay broken module on oxidation wind branch pipe upper portion, detain broken module and include a baffle, set gradually installing zone, bubble detention district, bubble breakage district and bubble equipartition district on the baffle, the venthole of oxidation wind branch pipe is located the baffle below, the installing zone is used for fixing on the oxidation wind branch pipe, sets up the broken hole of a plurality of interval arrangements along the parallel lines with oxidation wind branch pipe axis on the baffle of bubble breakage district, installs broken subassembly on broken hole, sets up the air vent of a plurality of interval arrangements along the parallel lines with oxidation wind branch pipe axis on the baffle of bubble equipartition district, and the air vent has the aperture size who is less than the venthole.
Furthermore, the air outlet holes, the crushing holes and the air holes are arranged in a staggered mode.
Further, the baffle uses the installing zone as middle zone, sets up bubble detention district, broken district of bubble, bubble equipartition district in this middle zone bilateral symmetry, and bubble detention district, broken district of bubble and bubble equipartition district place baffle extend to the direction of keeping away from oxidation wind branch pipe and form the hanging wing, and the hanging wing of oxidation wind branch pipe both sides all inclines towards oxidation wind branch pipe.
Furthermore, the baffle comprises inner plate, outer panel and two edge seal boards connected, wherein the middle part and the oxidation wind branch pipe outer circumference of inner plate are connected, outer panel both sides all set up a vertical board and are used for connecting the both sides of inner plate, and two edge seal boards are installed respectively on the board both ends face that inner plate and outer panel enclose.
Furthermore, the cross-sectional structure of baffle medial plate is for being located the arc at middle part and six indent trapezoids that are located the arc both sides, and six indent trapezoids each side respectively sets up threely, correspond bubble detention district, bubble breakage district and bubble uniform distribution district respectively.
Furthermore, the outer side plate of the baffle plate, which is far away from the oxidation wind branch pipe, is a corrugated plate.
Furthermore, the crushing assembly comprises a mounting plate, a hollowed cone and two mounting holes, the hollowed cone comprises a plurality of sector surfaces and a central circular tube, the tops of the sector surfaces are fixed on the central circular tube, the arc parts of the sector surfaces are suspended, and a gap is reserved between two adjacent sector surfaces; the other end of the central circular tube is fixed on the mounting plate, the mounting holes are formed in the mounting plate and are symmetrically arranged in the center of the hollow cone, the crushing assembly is fixed on the baffle through the mounting holes through bolts, and the hollow cone penetrates through the crushing holes.
The utility model has the beneficial technical effects that: the wingspan structure and different regions that set up not only improve the residence time of oxidizing wind bubble, still reduced the bubble size through the breakage, when can effectively reduce the unit variable operating mode, the air feed volume under the different oxidizing wind demand has improved the utilization ratio of oxidizing air to improve oxidation efficiency in the wet flue gas desulfurization technology.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic view of the application structure of the present invention;
FIG. 2 is a schematic sectional view of the installation structure of the retention crushing module and the oxidation wind branch pipe of the present invention;
FIG. 3 is a bottom view of the retention crushing module and the installation structure of the oxidation wind branch pipe of the present invention;
fig. 4 is a structural view of the crushing assembly of the present invention;
in the figure: 1. oxidizing air branch pipe, 2, venthole, 3, retention crushing module, 4, baffle, 5, mounting area, 6, outer panel, 7, edge shrouding, 8, bubble retention area, 9, bubble crushing area, 10, bubble uniform distribution area, 11, vent hole, 12, mounting hole, 13, crushing hole, 14, sector.
Detailed Description
Example 1
A630 MW unit desulfurization system is provided with a double-tower system, a pipe network type oxidation air system is adopted by a first-stage tower and a second-stage tower, the oxidation air blower of the first-stage tower is 2 high-power Roots blowers, the power of the oxidation air blower is 450kW, the pressure head is 119.08kPa, the rated current is 55A, the output air quantity of the Roots blower is not adjustable, the energy consumption is high, and the problem of blockage of an oxidation air branch pipe frequently occurs.
The oxidation of sulfite is an important reaction in the limestone-gypsum wet desulphurization process, and the dissolved oxygen in the desulphurization slurry of the absorption tower oxidizes the sulfite into sulfate radical, and the reaction formula is as follows:
the dissolved oxygen in the desulfurization slurry of the absorption tower comes from air blown by an oxidation fan, wherein a small part of oxygen is dissolved into the slurry, most of the oxygen finally overflows from a slurry pool and is mixed with the flue gas entering the desulfurization absorption tower, and one part of the oxygen dissolved into the slurry is mixed with SO 3 2- The oxidation reaction is carried out, and the unreacted part of oxygen is SO 3 2- The reaction driving force of oxidation is that the larger the dissolved amount of bubbles in the slurry is, the SO is treated 3 2- The higher the reaction driving force of oxidation, the higher the oxidation air utilization rate, and the smaller the air bubbles coming out of the oxidation air branch pipe and the longer the residence time in the slurry, the higher the dissolution amount in the slurry. At present, the blockage of a pipe network type oxidation air system air pipe and the unreasonable arrangement of an air outlet cause the overlarge air bubbles and the short detention time of the air bubbles in slurryTherefore, how to prevent the blockage of the oxidation air pipe, how to reduce the size of the air bubbles and improve the residence time of the air bubbles in the slurry are the key technical points for improving the utilization rate of the oxidation air of the limestone-gypsum wet desulphurization facility.
Therefore, a pipe network type oxidation air pipe retention crushing device is designed, as shown in fig. 1, retention crushing modules 3 are arranged on 7 oxidation air branch pipes 1, and the whole formed by the retention crushing modules 3 is positioned at the upper part of the oxidation air branch pipes 1. As shown in fig. 2 and 3, the retention crushing module 3 comprises a baffle 4 with the thickness of 3mm, a mounting area 5 is sequentially arranged on the baffle 4, a bubble retention area 8, a bubble crushing area 9 and a bubble uniform distribution area 10, an air outlet 2 of an oxidation air branch pipe 1 is positioned below the baffle 4, the mounting area 5 is used for being fixed on the oxidation air branch pipe 1, 8 crushing holes 13 which are arranged at intervals are arranged on the baffle of the bubble crushing area 9 along a parallel line with the axis of the oxidation air branch pipe, a crushing assembly is arranged on the crushing holes 13, a plurality of vent holes 11 which are arranged at intervals are arranged on the baffle of the bubble uniform distribution area 10 along a parallel line with the axis of the oxidation air branch pipe, and the vent holes 11 have the aperture size smaller than the air outlet 2.
Baffle 4 is connected the plate body that has certain thickness that constitutes by interior plate, outer panel 6 and two edge shrouding 7, is 3mm in this embodiment, and wherein the middle part and the outer circumference of oxidation wind branch pipe 1 of interior plate are connected, and 6 both sides of outer panel all set up a vertical board and are used for connecting the both sides of interior plate, and two edge shrouding 7 are installed respectively on the board both ends face that interior plate and outer panel 6 enclose.
The embodiment adopts a modular assembly design, a plurality of groups of modules are distributed on the whole branch pipe along the axial direction of the oxidation wind branch pipe, the baffle 4 adopts a partition design, and the areas are divided into three stages by the bubble retention area 8, the bubble crushing area 9 and the bubble uniform distribution area 10, wherein the bubble retention area 8 close to the oxidation wind branch pipe is a first stage wingspan baffle, and outwards sequentially comprises a second stage and a third stage, and the first stage wingspan baffle is not provided with vent holes and is a bubble retention area; crushing holes 13 with certain size are formed in the bulges of the second-stage wingspan baffle at equal intervals, the crushing holes 13 are linearly arranged at the bulges, and bubble crushing components are additionally arranged in the crushing holes 13; and each bulge of the third-stage wingspan baffle is only provided with a circular vent hole with a certain size, and a bubble crushing unit is not additionally arranged.
The large-size air bubbles entering the slurry through the air outlet holes 2 of the oxidizing air branch pipes are gathered in the bubble retention area of the retaining crushing device baffle plate under the blocking effect of the retaining crushing device in the slurry ascending process, when the large bubbles are full of the area, the excessive large bubbles sequentially enter the bubble crushing area, the large bubbles are physically divided into independent small bubbles in the crushing assembly of the crushing area, the bubble volume is reduced, the contact area of the bubbles and the slurry is increased, under the resistance effect of the crushing area, the retention time of the bubbles in the slurry is further increased, when the unit is low in load and low in oxidizing air demand, most of the air bubbles continuously ascend in the slurry through the bubble crushing area, when the unit is high in load and high in oxidizing air demand, the excessive bubbles do not reach the bubble crushing area and sequentially enter the bubble distributing area, after passing through the distributing area, the extremely small amount of the bubbles continuously ascend in the slurry, the edge of the retained air crushing device partially escapes, the retention time of the oxidizing air crushing device is increased, the effective air supply utilization rate of the air unit is reduced, and the effective air supply utilization rate of the unit is reduced.
Example 2
As a specific design, as shown in fig. 2, the baffle 4 uses the installation area 5 as a middle area, the bubble retention area 8, the bubble crumbling area 9, and the bubble distribution area 10 are symmetrically disposed on both sides of the middle area 5, the baffle where the bubble retention area 8, the bubble crumbling area 9, and the bubble distribution area 10 are located extends in a direction away from the oxidation wind branch pipe 1 to form a suspension wing, and the suspension wings on both sides of the oxidation wind branch pipe 1 are inclined toward the oxidation wind branch pipe.
The cross-sectional structure of baffle 4 inner side plate is for being located the arc at middle part and six indent trapezoids that are located the arc both sides, and six indent trapezoids each side respectively set up threely, correspond bubble detention district 8, bubble breakage district 9 and bubble uniform distribution district 10 respectively.
Tests show that the majority of the oxidizing air entering the slurry from the air outlet holes 2 of the oxidizing air branch pipes enters the slurry through the bubble retention area 8, the bubble crushing area 9 and the bubble uniform distribution area 10, the retention time of bubbles in the slurry tank is about 8.6s, and the retention time of bubbles is greater than 7.7s of the scheme without the inward concave trapezoid.
The outer side plate 6 of the baffle 4 is a corrugated plate for assisting air bubble retention.
Example 3
As a specific design, as shown in fig. 4, the crushing assembly comprises a mounting plate, a hollow cone and two mounting holes 12, wherein the hollow cone comprises a plurality of sector surfaces 14 and a central circular tube, the top of each sector surface 14 is fixed on the central circular tube, the arc-shaped part of each sector surface 14 is suspended, and a gap is reserved between every two adjacent sector surfaces 14; the other end of the central circular tube is fixed on the mounting plate, the mounting holes are formed in the mounting plate and are symmetrically arranged in the center of the hollow cone, the crushing assembly is fixed on the baffle through the mounting holes through bolts, and the hollow cone penetrates through the crushing holes 13.
The crushing assembly is integrally processed and formed by adopting a grinding tool injection molding process, the material is reinforced PP, the hollow conical crushing holes are formed by 5 45-degree variable-section fan-shaped cones, the cone tops of the hollow cone-shaped crushing holes are externally tangent to the inner wall of the circular tube, the cone bottoms of the hollow cone-shaped crushing holes are arranged in a suspended mode, the crushing assembly is fixed on the wingspan baffle plate through mounting holes through bolts, and the air outlet holes 2 of the oxidizing air branch tubes and the crushing holes and the air vents of the crushing device are arranged in a staggered mode.
The large-size bubbles entering the slurry from the air outlet holes of the oxidizing air branch pipes are firstly gathered in a bubble retention area 8 in the process of rising in the slurry, after the large bubbles are filled in the area, the excessive large bubbles sequentially enter a bubble crushing area 9, the large bubbles are physically divided into independent small bubbles by a variable cross-section cone in hollow cone crushing holes of the crushing area, the bubble volume is reduced, the contact area of the bubbles and the slurry is increased, the retention time of the bubbles in the slurry is further prolonged under the resistance action of the crushing area, when the unit is in low load and low oxidizing air demand, most of the air bubbles continuously rise in the slurry through the bubble crushing area, when the unit is in high load and high oxidizing air demand, the excessive bubbles can bypass the bubble crushing area to enter a bubble distributing area, and continuously rise in the slurry through air vents of the distributing area, and extremely trace bubbles escape through a wingspan area and the edge part of the edge sealing plate.
The utility model discloses an oxidation wind is detained and the bubble is broken, is showing and is improving the detention time of oxidation air in the thick liquid, has effectively reduced the bubble size of oxidation tuber pipe export, has improved the area of contact and the contact time of bubble with the desulfurization thick liquid to oxidation wind utilization ratio has been improved.
Above-mentioned embodiment is only as right the utility model discloses technical scheme's explanation can not be as right the utility model discloses technical scheme's restriction, all are in the utility model discloses simple improvement on the basis all belongs to the utility model discloses a protection scope.
Claims (7)
1. The utility model provides a pipe network formula oxidation tuber pipe is detained breaker which characterized in that: the device comprises a plurality of retention crushing modules which are installed on a pipe network type oxidation wind branch pipe and located on the upper portion of the oxidation wind branch pipe, wherein each retention crushing module comprises a baffle, an installation area, a bubble retention area, a bubble breaking area and a bubble uniform distribution area are sequentially arranged on the baffle, air outlet holes of the oxidation wind branch pipe are located below the baffle, the installation area is used for being fixed on the oxidation wind branch pipe, a plurality of breaking holes which are arranged at intervals are arranged on the baffle of the bubble breaking area along parallel lines with the axis of the oxidation wind branch pipe, a breaking assembly is installed on each breaking hole, a plurality of air vents which are arranged at intervals are arranged on the baffle of the bubble uniform distribution area along parallel lines with the axis of the oxidation wind branch pipe, and the air vents have the aperture sizes smaller than the air outlets.
2. The pipe-network type oxidation air pipe retention crushing device according to claim 1, characterized in that: the air outlet holes are arranged in a staggered manner with the crushing holes and the vent holes.
3. The pipe network type oxidation air pipe retention crushing device according to claim 1, characterized in that: the baffle uses the installing zone to set up bubble detention district, bubble disruption district, bubble equipartition district at this middle zone bilateral symmetry, and bubble detention district, bubble disruption district and bubble equipartition district place baffle extend to the direction of keeping away from oxidation wind branch pipe and form the hanging wing, and the hanging wing of oxidation wind branch pipe both sides all inclines towards oxidation wind branch pipe.
4. The pipe-network type oxidation air pipe retention crushing device according to claim 1, characterized in that: the baffle is connected by interior plate, outer panel and two edge shrouding and constitutes, and wherein the middle part and the outer circumference of oxidation wind branch pipe of interior plate are connected, and the outer panel both sides all set up a vertical board and are used for connecting the both sides of interior plate, and two edge shrouding are installed respectively on the board both ends face that interior plate and outer panel enclose.
5. The pipe-network type oxidation air pipe retention crushing device according to claim 4, characterized in that: the cross-sectional structure of baffle medial plate is for being located the arc at middle part and six indent trapezoids that are located the arc both sides, and six indent trapezoids each side respectively set up threely, correspond bubble detention district, bubble breakage district and bubble equipartition district respectively.
6. The pipe-network type oxidation air pipe retention crushing device according to claim 4, characterized in that: the outer side plate of the baffle plate, which is far away from one side of the oxidation wind branch pipe, is a corrugated plate.
7. The pipe-network type oxidation air pipe retention crushing device according to claim 1, characterized in that: the crushing assembly comprises a mounting plate, a hollowed cone and two mounting holes, the hollowed cone comprises a plurality of sector surfaces and a central circular tube, the tops of the sector surfaces are fixed on the central circular tube, the arc parts of the sector surfaces are suspended, and a gap is reserved between two adjacent sector surfaces; the other end of the central circular tube is fixed on the mounting plate, the mounting holes are formed in the mounting plate and are symmetrically arranged with the centers of the hollow cones, the crushing assembly is fixed on the baffle through the mounting holes through bolts, and the hollow cones penetrate through the crushing holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222143183.5U CN218077237U (en) | 2022-08-16 | 2022-08-16 | Pipe network type oxidation air pipe retention crushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222143183.5U CN218077237U (en) | 2022-08-16 | 2022-08-16 | Pipe network type oxidation air pipe retention crushing device |
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| Publication Number | Publication Date |
|---|---|
| CN218077237U true CN218077237U (en) | 2022-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222143183.5U Active CN218077237U (en) | 2022-08-16 | 2022-08-16 | Pipe network type oxidation air pipe retention crushing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218077237U (en) |
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2022
- 2022-08-16 CN CN202222143183.5U patent/CN218077237U/en active Active
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